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tv   [untitled]    March 10, 2013 9:30am-10:00am PDT

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up to code. it is up to the 1909 code. in 1909 there was no requirement for earthquake design. >> until 1933 when the reilly act went into effect after the disastrous 1933 santa barbara -- >> long beach. >> destroyed elementary schools. they were brick. if the kids were in school, we would have lost thousands of kids. that banned brick construction and required seismic designs to be incorporated in buildings. >> there was a major -- there are a number of thresholds over the course of the development. the big one is in the mid '70s, but a whole threshold, series of these thresholds. many of the older buildings,
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like the 1 across the street have been upgraded to meet some modern standards. this is the williams building that we were talking about that is the replacement of the building that was damaged in the 1906 earthquake. it was built just like it with the plans. >> this building they were going to dynamite it. in '06, they dynamited buildings to clear the path. >> from an interesting point of view, spencer is here, this building is incorporating into the brand-new building next to it, which makes the new building an addition. it is not a new building. it is a brand-new building meeting today's code. we say you are a gigantic addition to an old historic building. >> did it change the permit
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fees? >> of course. >> one thing about publication able is how well buildings will perform. the brand-new building down there which is what? >> the brand-new glass and steel building. when we build brand-new high rise buildings they're required to meet the minimum standard of the building code. the building code is a minimum standard document. can you choose to build beyond it. few people choose to build buildings that are immediately occupiable after an earthquake. most build buildings that won't collapse, which is what the building standard is. they won't collapse and they can be repair side whed is what we reasonably expect. >> potentially repaired. >> that is not what the public may think.
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earthquake proof. >> earthquake resistant. >> exactly. a lot of streets fill up with a lot of debris. the cornice, signs, glass, all that falls off the building. we have seen that in other earthquakes. the question is will we see that from new buildings as well? actually new buildings are designed so the buildings can sway or drift and there is enough so the glass doesn't pop out. >> my best advice don't run out the door. if it is big enough you can't stand up. probably the best place to be is the building you're in, stay put. >> do not run outside. the most hazardous place is right outside the building where all the stuff might fall down. i was in japan at the time of
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the big earthquake. i was a few miles away. i went and looked at it. the sidewalks were filled. filled all the debris from the front of the building. stay in the building. we are in the danger zone. what are we doing here. if there is an earthquake now. >> it will be on film. >> it will all be on film. >> we have a question. >> i was wondering, did i understand correctly that this whole new tower is grandfathered in by being part of the older building? is it being done with the old requirements? >> no, the new construction has to meet the requirements of today's code. they could have by law built the new tower to meet today's code and leave the old building to meet the old conditions. >> it was so badly damaged the city required it to be retrofitted. there was a retrofit done while
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debating whether to dynamite it. >> any new addition has to meet today's code. any part of the old building that supports the new addition vertically or laterally has to address today's code. we will walk a block down and look at the rialto building. (♪ music playing ) >> we're still here on mission street at the corner of annie alley. they're named, somebody told me they're named for san francisco's early famous ladies. (chuckling). >> i want to point out the building here at 660 mission street, which i believe is an unreinforced masonry building retrofitted, seismically upgraded. once it is seismically upgraded, it is safe, right? >> when you seismically upgrade
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it, it is to a standard it doesn't collapse, but it may not be reusable or repairable. >> it was an economic decision of how much money the city could afford versus the benefits to retrofit the buildings. >> we have done about 90% of the upgrade. the standard is low enough that in a major upgrade most will have to be replaced and we lose these beautiful buildings. many of the details are not what they appear to be. these are sheet metal details and trims. sheet metal cornices. san francisco was famous for the sheet metal work. when you go into the sheet metal shop, the whole front of the building is made of sheet metal. that is pacific? no, powell. >> i trick on how you can date old brick buildings, after the
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'06 earthquake they made windows with steel plates. before that earthquake if you see an arch, it is a pre '06. it is an easy way to date the buildings. >> you can see the great depth. that indicates these are exceptionally thick walls which indicates it is masonry construction. >> pretty much everything on this block here is post '06, except for that building right there. and this building here, with the available sign on it, i used to own it a long time ago. i retrofitted it to a very high standard. can you retrofit brick buildings to a high standard, if you choose to, since i was going to occupy it.
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it would be embarrassing for an engineer to be in a building that is damaged. >> there is an issue of what standard. is it collapse prevention or immediate occupancy or immediate use. often i have found that the marginal cost difference is quite low to go to that next level. maybe a little more when you go up to the -- when you want to keep using immediate occupancy. but people need to understand that and make a conscious decision. do not leave the decisions to the engineer. these are not engineering decisions. they're your personal decisions as an owner. >> since i was the owner i made the decision to go up. >> very informed owner. we will walk up to the rialto building on the corner up here. keep walking. (♪ music playing ) >> we are here just a little further down mission street past annie alley toward new montgomery. it was badly damaged.
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this was also burned? >> it also experienced fire damage. >> and dynamite damage? >> we will talk about the dynamite damage. people don't understand how much dynamiting they actually did. >> let's start with this brick building we are in front of. this is a building built after the 1906 earthquake and it was seismically retrofitted. you see the key elements you will notice when it is seismically retrofitted. if we look at the building we see the diagonal steel bracing which is a key feature of many. >> most buildings have diagonal bracing for the earthquake because it is the most efficient, cost-effective way to carry the load. it has an effect of the architectural statement of the building, but the most efficient way to do the earthquake design.
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>> this building will be demolished is that right. >> yes. spurs, san francisco planning research bought this for the new headquarters building and they wanted something that was going to be more efficient and near square footage. in the planning process now to demolish this and build a snew structure. >> spur will demolish it and build a taller building. it is a great organization. we hate losing old buildings, but spur of all organizations is careful about the historic value of the city. there are the pictures of the building that will be a terrific building. let's look across the street. >> talk about the small one first. >> if you go in there it was my offices for a number of years. if you go in looking for the braces they don't exist because they're not there. we used moment frames to hide
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the braces from the architectural statement of the building. just because you don't see braces don't mean the building hasn't been retrofitted. i as an informed owner didn't want to see the braces. >> the braces are the big diagonal thing. he put very large, like a big vertical and steel column with a big beam across and welded it up and hid it inside the frame of the building. >> you won't see it if you go in there and have lunch. the new owners opened up a lunch place. >> it just opened up. i don't have a chance to say yes or no. >> after this we will go in and have lunch. we have a comment here by mr. bonowitz. >> you retrofitted the small building and adjacent to it i see two brick buildings. >> how do you feel about the big buildings. >> that is a hard question to answer. i put very thick plywood on the
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roof. >> how thick to support a story falling? >> (laughter). >> thanks for helping me out. (laughter). >> the rialto building. this is interesting building that survived the '06 quake. >> it did. in some of the reports it is reported it had undergone earthquake damage. if you look more into the building. in the 1907, they basically explain the damage is dynamiting. this is a building they tried dynamite apart to create a fire break, and the building wouldn't do it. it said no because it is a steel framed building. and as a class steel frame buildings are very resistant to both earthquakes and dynamite. >> am i right? i think steel frame buildings are resistant, it is the composite action of the steel frame and other elements that are together with the frame that help make them support; is that
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right? >> yes. that includes the walls, the floor diaphragms. but the fire was really bad. this is what they were trying to do here is a fire break here. in addition to the heroic fire break that stopped the fire on van ness. >> dynamited around here. not just earthquake or fire damage, it was dynamite damage. >> one of the interesting stories is the amount of dynamiting they were doing in some cases was so excessive it was damaging buildings that survived the earthquake and fire because they were blowing up the building 2 blocks away. the classic story is on the post office. it survived the earthquake and fire fine, but didn't survive the dynamiting of the next-door neighbor's building. >> they threw up flaming shards. and set the buildings alight. >> for an old steel frame, you
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see the beam and column and you can see the frame is shown there. on the side of the building, it is more solid with brick. the older steel frame correct relies on participation of the infill masonry and other stuff in there. they new steel frame building 101 california the high-rise down the block relies basically on the steel. you don't have that infill brick because that becomes a hazard sometimes too if it falls away from the building. a newer steel frame building relies on the frame itself without infill. >> what that means is we're cutting thinner and thinner toward the acceptable level of safety. we're optimizing. i see that as reducing the comfort. i don't know. what do you think about that? >> i am in a 1920 steel frame building. i am very comfortable being in it. i would be as comfortable being
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in a 1995 steel frame building. when they came out with computer programs and could analyze down to 10 significant figures are the buildings the engineering community scratched their head and said we did too good of a job. optimize it. >> we're near second. there is an interesting older building that is a tall steel frame building that was badly damaged. >> it was cracked. exterior walls were cracked. it was repaired. i was retained by the owner to investigate the building. in the robeling steel institute report it was identified as damage identical to the '89 damage. what was fascinating is the fire damage inside.
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they had steel shutters and wire class. the floors where they closed the windose h windows had no fire damage. and without the windows closed had fire damage. >> in reading the reports, is that fire spread happens through openings and windows. we have lots of belliuildings w openeni openenings. if it was built that way we don't knock on the door say together is a hazard. it was built that way during the time. they're burning buildings with a fire-proof paint. if you coordinate that with wire glass or shutters or some kind of opening protection. i want to tell a story about the building across the street. in the 1989 earthquake, it was damaged. the whole facade was cracked.
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you can look up there. maybe we can get shots. the cracks, you can see them underneath, between the windows, these are classic earthquake cracks. the owner of the building at the time didn't know what to do. we had it wrapped with chain link fence and had to close off a lane of mission street for a while. the owner couldn't figure out what to do. the building was so important to him and an emotional part of his life, that he hung on to it even though he had to make payments on it and paying money to do bracing. it finally drove him into bankruptcy. he died. his estate sold the building. buildings are more than buildings. they become part of people's lives. there are other issues. when engineers look at a building and say it is a crack here and it represents that. it is the first step, we have found. in all the earthquake, the
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important question is what does this mean to the owner and people that use it and how will it fit back into the pattern of life. >> in '06, a lot of people committed suicide because they lost everything. >> it is not just the financial loss. it is the other loss that is meaningful. >> your homes, belongings. >> which is one of the reasons that pat and i say look at the marginal cost difference of improving your home or building to the point you can plan to use it after an earthquake. >> sleep in it. >> a home to go to and bed to lie in even if it has repair. >> that is a standard people ought to think about. >> the standard you ought to retrofit your house to is at the end of the nice you can climb into your bed. may not take a bath or shower but you can sleep in your bed. >> this is where we have an all-week centennial convention to commemorate the earthquake
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but to look at the new advances in engineering and risk analysis and what it means for public policy. one of the things interesting is at this convention we see new products and technologies being brought forward. in my 25 years as a building inspector this is the most interesting. where something has changed. this is fire-proof paint they're demonstrating here. the building at the end, and the building at this end were both filled with some material, wood and excelier and stuff to start a fire. they lit them at the same time. four or five minutes ago. the building on the end is painted with regular latex paint on everybody's house. the building next to that is painted with latex paint. >> that is catching fire now. >> we can simulate the fire spread from house to house.
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and we anticipate unfortunately again. the next 2 buildings are coated with the fireproof paint. many companies make this stuff. this is a particular brand made international fire resistance. >> they were generous to do the mock up for us. >> they have done this at the request of the building department. we have seen that the building at the end, just painted with latex paint is just about gone. the building next-door is catching fire and will burn through the wall shortly. the building at this end show smoking as the material inside burns. we will see where it goes from there. here we have someone from california oes and fire department. put your hand right up against the wall it is not even too hot to touch. thei the implications of this are dramatic. providing fire resistive barriers is quite expensive. it requires sheetrock.
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>> pouring off the siding and putting it back. in san francisco we have zero lot lines. it is impossible. they have equipment to slide in and apply this material. >> we have used it a lot in san francisco for historic buildings where we want to preserve the detail. the trim and cove and ornamentation. you can improve the fire resistanceness of the building by having it applied by spray. >> we have tom here who is in charge of the fire training. what do you see going on >> four buildings made of the same material but protected by the same paint. >> now we have three buildings. >> yeah, three. there was four. >> right. this problem where we have fire spread from one building to the next building that is a san francisco problem? >> yeah, in fact, there is probably more gap here between these buildings than there is in
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our normal -- >> which is usually a half an inch to an inch. >> right. >> sometimes they're separated at the ends and the fire is contained within the gap. you have a chimney build up. >> one of the things to point out they're using normal combustibles to start the fire which is wood and straw. in the year 2006 in people's home the normal combustible is not a class a material it is class c, which is the polystyrenes and foam materials. so the natural produced on the interior of the building is greater than what you see here today. >> if we fill this with sofa and couches. >> computers, kid furniture, teddy bears. >> okay. what is happening with the one with fireproof paint. i am amazed it is reflecting the heat. put your hand on the side and it is deflecting it away. >> there is a flame inside.
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>> can we put our hand up there. >> at your own risk. >> i can. sure i can. not gonna catch fire. so the paint reflects the heat and also i understand it foams up and makes a protective foam layer as well. it is amazing stuff. >> we will be here quite a while. >> the fire is still burning inside strongly. the first building that they had the same materials, same construction, lit them at the same time. that one is nothing left. >> yeah. >> this has yet to ignite. it is offgassing and reflecting all the energy. >> in the middle, we are waiting to see if the fire spreads. it is spreading from the one end down. >> the second one has the same material for exposure. it is comparing two buildings with the same protection, against two buildings with the same protection for the main
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fire building, one for exposure and next to it. the second one is catching. >> we have environmental factors effecting this. we have wind blowing in a certain direction. the exposure on the one next to it not really any heat. this is a good demonstration. >> the interesting deal right off the bat is that one burned down and this one -- >> has yet to ignite. >> i see spoke. >> just the products inside that are burning. >> wow. very exciting. >> so i can imagine -- i'm with the building department, there are real implication for providing fire resistive safety in buildings if we can figure out how to properly apply it and make sure people don't cut holes in it. >> there are fire service and dynamics that go there. the building industry and manufacturers love the late
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weight trusses and guszet plates, things that perform great until you expose them to fire. firemen have to walk on these. >> more firemen have been killed because of building collapses than ever documented before. there are buildings engineered strong under normal conditions. add the fire component to it, and the fire -- the line is for a firefighter, the building is your enemy. know your enemy. if you know how it is put together you know how it will come apart. now you add this product -- >> a new unknown. i am not saying this is going to effect the building, but what is the offgassing right now. >> i read the test reports. there are issues. we have to look at the issues together. >> the second building finally caught. the material is available. it is not, i believe intended to be used as an exterior -- you
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have to overpaint it because it doesn't have a uv protective barrier in it yet. if you put it up and overpaint it or put it between two buildings where there is no sunshining, it is okay. here is the guy that invented this stuff. this is a dramatic exhibition, are you satisfied. >> if we had more wind the other building would have flashed over sooner. it is still, to see it really engage this other building and you will see how will the coating holds up. i am impressed. >> everybody is. what is happening to the coated building. >> it is containing the fire to the room of origin. the crib in here is going out on its own. no flame spread or flash over. >> what kind of uses have you used this? what kind of buildings. >> we have done elderly care facilities, hospitals, schools, a lot of church retrofits,
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litigation retrofits in which we bring up the walls to one and two-hour code. >> it is listed for one and two hour based on how thick you apply it. >> yes. we're good on lasting plastic, wood, foam, sheetrock. lasting structures. >> i will put my hand on here. it is definitely getting warm, getting hot. but not too hot to touch. in fact, the source of ignition inside is almost out. okay. that is about it for today. building san francisco walking tour. very exciting. we get to end with a splash, a blast here. >> someone else has to clean up. i love those kind of parties. >> they're putting out what is left of that and keeping it from blowing around. thank you all very much. we will see you next month for more exciting san francisco building stories.
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i don't know what they'll be. (♪music playing)
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>> san francisco is home to some of the most innovative companies of the 21st century. this pioneering and forward looking spirit is alive in san francisco government as well. the new headquarters of the san francisco public utilities commission at a5 25 golden gate avenue is more than just a 13-story building and office ablation. instead, city leaders, departments and project managers join forces with local architectural firms ked to build one of the greatest office buildings in america. that's more than a building. that's a living system.


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